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authorAndy Whitcroft <apw@canonical.com>2012-05-04 22:15:11 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-06-17 11:21:29 -0700
commit0d48d35de9b7dbe7e68d2a741c2f8d6a9e2eed3f (patch)
tree9ff276a43a413e6732d01222a35b5dbcfb60fa51 /Makefile
parent54a40b2cf40d655dbbdcc017288be75b1ae1b701 (diff)
ata_piix: defer disks to the Hyper-V drivers by default
commit cd006086fa5d91414d8ff9ff2b78fbb593878e3c upstream. When we are hosted on a Microsoft Hyper-V hypervisor the guest disks are exposed both via the Hyper-V paravirtualised drivers and via an emulated SATA disk drive. In this case we want to use the paravirtualised drivers if we can as they are much more efficient. Note that the Hyper-V paravirtualised drivers only expose the virtual hard disk devices, the CDROM/DVD devices must still be enumerated. Mark the host controller ATA_HOST_IGNORE_ATA to prevent enumeration of disk devices. BugLink: http://bugs.launchpad.net/bugs/929545 BugLink: http://bugs.launchpad.net/bugs/942316 Signed-off-by: Andy Whitcroft <apw@canonical.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Cc: Victor Miasnikov <vvm@tut.by> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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